[security] use a stronger encryption algorythm for password, keeping bw compat
Administrator should ask their users to reenter new password so they
benefit from the new encryption.
Also, new encryption is cross-platform compatible, eg you may now move an instance
from windows to linux painlessly
from yams.buildobjs import RelationDefinition
class ARelation(RelationDefinition):
subject = 'CWUser'
object = 'CWGroup'